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Diffstat (limited to 'src/imports/wavefrontmesh/qwavefrontmesh.cpp')
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diff --git a/src/imports/wavefrontmesh/qwavefrontmesh.cpp b/src/imports/wavefrontmesh/qwavefrontmesh.cpp deleted file mode 100644 index 6be5c3d73f..0000000000 --- a/src/imports/wavefrontmesh/qwavefrontmesh.cpp +++ /dev/null @@ -1,681 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2018 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtQuick module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qwavefrontmesh.h" - -#include <QtCore/qfile.h> -#include <QtCore/qtextstream.h> -#include <QtCore/private/qobject_p.h> - -#include <QtGui/qvector2d.h> -#include <QtGui/qvector3d.h> - -#include <QtQml/qqmlfile.h> -#include <QtQml/qqmlcontext.h> - -#include <QtQuick/qsggeometry.h> - -QT_BEGIN_NAMESPACE - -class QWavefrontMeshPrivate : public QObjectPrivate -{ -public: - QWavefrontMeshPrivate() - : lastError(QWavefrontMesh::NoError) - {} - - Q_DECLARE_PUBLIC(QWavefrontMesh) - - static QWavefrontMeshPrivate *get(QWavefrontMesh *mesh) - { - return mesh->d_func(); - } - - static const QWavefrontMeshPrivate *get(const QWavefrontMesh *mesh) - { - return mesh->d_func(); - } - - QVector<QPair<ushort, ushort> > indexes; - QVector<QVector3D> vertexes; - QVector<QVector2D> textureCoordinates; - - QUrl source; - QWavefrontMesh::Error lastError; - - QVector3D planeV; - QVector3D planeW; -}; - -/*! - \qmlmodule Qt.labs.wavefrontmesh 1.\QtMinorVersion - \title Qt Labs WavefrontMesh QML Types - \ingroup qmlmodules - \brief The WavefrontMesh provides a mesh based on a Wavefront .obj file. - - To use this module, import the module with the following line: - - \qml - import Qt.labs.wavefrontmesh - \endqml -*/ - -/*! - \qmltype WavefrontMesh - \inqmlmodule Qt.labs.wavefrontmesh - \instantiates QWavefrontMesh - \ingroup qtquick-effects - \brief The WavefrontMesh provides a mesh based on a Wavefront .obj file. - \since 5.12 - - WavefrontMesh reads the geometry from a Wavefront .obj file and generates - a two-dimensional \l{QSGGeometry}{geometry} from this. If the .obj file - contains a three-dimensional shape, it will be orthographically projected, - onto a plane. If defined, this is given by \l projectionPlaneV - and \l projectionPlaneW. Otherwise, the first face encountered in the data - will be used to determine the projection plane. - - If the file contains texture coordinates, these will also be used. Otherwise, - the vertexes of the object will be normalized and used. - - The mesh can be used in a ShaderEffect to define the shaded geometry. The - geometry will be normalized before use, so the position and scale of the - input objects have no impact on the result. - - \note Some Wavefront exporters will change the source scene's coordinate system - before exporting it. This can cause unexpected results when Qt applies the - projection. If the visual results are not as you expect, try checking the export - parameters and the documentation of the editor tool to see if this is the case. - - For instance, the following example takes an .obj file containing a standard torus - and visualizes the automatically generated texture coordinates. - - \table - \row - \li \image qtlabs-wavefrontmesh.png - \li \qml - import QtQuick 2.\1 - import Qt.labs.wavefrontmesh 1.\1 - - ShaderEffect { - width: 200 - height: 200 - mesh: WavefrontMesh { - source: "torus.obj" - projectionPlaneV: Qt.vector3d(0, 1, 0) - projectionPlaneW: Qt.vector3d(1, 0, 0) - } - vertexShader: " - uniform highp mat4 qt_Matrix; - attribute highp vec4 qt_Vertex; - attribute highp vec2 qt_MultiTexCoord0; - varying highp vec2 coord; - void main() { - coord = qt_MultiTexCoord0; - gl_Position = qt_Matrix * qt_Vertex; - }" - fragmentShader: " - varying highp vec2 coord; - uniform lowp float qt_Opacity; - void main() { - gl_FragColor = vec4(coord.x, coord.y, 0.0, 1.0); - }" - - } - \endqml - \endtable - - \note Since the input is a 3D torus, we need to define the projection plane. This would not be necessary when - using a 2D shape as input. We use the XY plane in this case, because of the orientation of the input. -*/ - -QWavefrontMesh::QWavefrontMesh(QObject *parent) - : QQuickShaderEffectMesh(*(new QWavefrontMeshPrivate), parent) -{ - connect(this, &QWavefrontMesh::sourceChanged, this, &QWavefrontMesh::readData); - connect(this, &QWavefrontMesh::projectionPlaneVChanged, this, &QQuickShaderEffectMesh::geometryChanged); - connect(this, &QWavefrontMesh::projectionPlaneWChanged, this, &QQuickShaderEffectMesh::geometryChanged); -} - -QWavefrontMesh::~QWavefrontMesh() -{ -} - -/*! - \qmlproperty enumeration WavefrontMesh::lastError - - This property holds the last error, if any, that occurred when parsing the - source or building the mesh. - - \list - \li WavefrontMesh.NoError No error has occurred. - \li WavefrontMesh.InvalidSourceError The source was not recognized as a valid .obj file. - \li WavefrontMesh.UnsupportedFaceShapeError The faces in the source is of an unsupported type. - WavefrontMesh only supports triangles and convex quads. - \li WavefrontMesh.UnsupportedIndexSizeError The source shape is too large. Only 16 bit indexes are supported. - \li WavefrontMesh.FileNotFoundError The source file was not found. - \li WavefrontMesh.MissingPositionAttributeError The 'qt_Vertex' attribute is missing from the shaders. - \li WavefrontMesh.MissingTextureCoordinateAttributeError The texture coordinate attribute in the shaders is wrongly named. Use 'qt_MultiTexCoord0'. - \li WavefrontMesh.MissingPositionAndTextureCoordinateAttributesError Both the 'qt_Vertex' and 'qt_MultiTexCoord0' attributes are missing from the shaders. - \li WavefrontMesh.TooManyAttributesError The shaders expect too many attributes (maximum is two: Position, 'qt_Vertex', and texture coordinate, 'qt_MultiTexCoord0'). - \li WavefrontMesh.InvalidPlaneDefinitionError The V and W vectors in the plane cannot be null, nor parallel to each other. - \endlist -*/ - -QWavefrontMesh::Error QWavefrontMesh::lastError() const -{ - Q_D(const QWavefrontMesh); - return d->lastError; -} - -void QWavefrontMesh::setLastError(Error lastError) -{ - Q_D(QWavefrontMesh); - if (d->lastError == lastError) - return; - - d->lastError = lastError; - emit lastErrorChanged(); -} - -/*! - \qmlproperty url WavefrontMesh::source - - This property holds the URL of the source. This must be either a local file or in qrc. The source will - be read as a Wavefront .obj file and the geometry will be updated. -*/ -QUrl QWavefrontMesh::source() const -{ - Q_D(const QWavefrontMesh); - return d->source; -} - -void QWavefrontMesh::setSource(const QUrl &source) -{ - Q_D(QWavefrontMesh); - if (d->source == source) - return; - - d->source = source; - emit sourceChanged(); -} - -void QWavefrontMesh::readData() -{ - Q_D(QWavefrontMesh); - d->vertexes.clear(); - d->textureCoordinates.clear(); - d->indexes.clear(); - - QString localFile = QQmlFile::urlToLocalFileOrQrc(d->source); - if (!localFile.isEmpty()) { - QFile file(localFile); - if (file.open(QIODevice::ReadOnly)) { - QTextStream stream(&file); - - QString buffer; - buffer.reserve(256); - - static QChar space(QLatin1Char(' ')); - static QChar slash(QLatin1Char('/')); - - while (!stream.atEnd()) { - stream.readLineInto(&buffer); - auto tokens = QStringView{buffer}.split(space, Qt::SkipEmptyParts); - if (tokens.size() < 2) - continue; - - QByteArray command = tokens.at(0).toLatin1(); - - if (command == "vt") { - bool ok; - float u = tokens.at(1).toFloat(&ok); - if (!ok) { - setLastError(InvalidSourceError); - return; - } - - float v = tokens.size() > 2 ? tokens.at(2).toFloat(&ok) : 0.0; - if (!ok) { - setLastError(InvalidSourceError); - return; - } - - d->textureCoordinates.append(QVector2D(u, v)); - } else if (command == "v") { - // Format: v <x> <y> <z> [w] - if (tokens.length() < 4 || tokens.length() > 5) { - setLastError(InvalidSourceError); - return; - } - - bool ok; - - float x = tokens.at(1).toFloat(&ok); - if (!ok) { - setLastError(InvalidSourceError); - return; - } - - float y = tokens.at(2).toFloat(&ok); - if (!ok) { - setLastError(InvalidSourceError); - return; - } - - float z = tokens.at(3).toFloat(&ok); - if (!ok) { - setLastError(InvalidSourceError); - return; - } - - d->vertexes.append(QVector3D(x, y, z)); - } else if (command == "f") { - // The scenegraph only supports triangles, so we - // support triangles and quads (which we split up) - int p1, p2, p3; - int t1 = 0; - int t2 = 0; - int t3 = 0; - if (tokens.size() >= 4 && tokens.size() <= 5) { - { - bool ok; - auto faceTokens = tokens.at(1).split(slash, Qt::SkipEmptyParts); - Q_ASSERT(!faceTokens.isEmpty()); - - p1 = faceTokens.at(0).toInt(&ok) - 1; - if (!ok) { - setLastError(InvalidSourceError); - return; - } - - if (faceTokens.size() > 1) { - t1 = faceTokens.at(1).toInt(&ok) - 1; - if (!ok) { - setLastError(InvalidSourceError); - return; - } - } - } - - { - bool ok; - auto faceTokens = tokens.at(2).split(slash, Qt::SkipEmptyParts); - Q_ASSERT(!faceTokens.isEmpty()); - - p2 = faceTokens.at(0).toInt(&ok) - 1; - if (!ok) { - setLastError(InvalidSourceError); - return; - } - - if (faceTokens.size() > 1) { - t2 = faceTokens.at(1).toInt(&ok) - 1; - if (!ok) { - setLastError(InvalidSourceError); - return; - } - } - } - - { - bool ok; - auto faceTokens = tokens.at(3).split(slash, Qt::SkipEmptyParts); - Q_ASSERT(!faceTokens.isEmpty()); - - p3 = faceTokens.at(0).toInt(&ok) - 1; - if (!ok) { - setLastError(InvalidSourceError); - return; - } - - if (faceTokens.size() > 1) { - t3 = faceTokens.at(1).toInt(&ok) - 1; - if (!ok) { - setLastError(InvalidSourceError); - return; - } - } - } - - if (Q_UNLIKELY(p1 < 0 || p1 > UINT16_MAX - || p2 < 0 || p2 > UINT16_MAX - || p3 < 0 || p3 > UINT16_MAX - || t1 < 0 || t1 > UINT16_MAX - || t2 < 0 || t2 > UINT16_MAX - || t3 < 0 || t3 > UINT16_MAX)) { - setLastError(UnsupportedIndexSizeError); - return; - } - - d->indexes.append(qMakePair(ushort(p1), ushort(t1))); - d->indexes.append(qMakePair(ushort(p2), ushort(t2))); - d->indexes.append(qMakePair(ushort(p3), ushort(t3))); - } else { - setLastError(UnsupportedFaceShapeError); - return; - } - - if (tokens.size() == 5) { - bool ok; - auto faceTokens = tokens.at(4).split(slash, Qt::SkipEmptyParts); - Q_ASSERT(!faceTokens.isEmpty()); - - int p4 = faceTokens.at(0).toInt(&ok) - 1; - if (!ok) { - setLastError(InvalidSourceError); - return; - } - - int t4 = 0; - if (faceTokens.size() > 1) { - t4 = faceTokens.at(1).toInt(&ok) - 1; - if (!ok) { - setLastError(InvalidSourceError); - return; - } - } - - if (Q_UNLIKELY(p4 < 0 || p4 > UINT16_MAX || t4 < 0 || t4 > UINT16_MAX)) { - setLastError(UnsupportedIndexSizeError); - return; - } - - // ### Assumes convex quad, correct algorithm is to find the concave corner, - // and if there is one, do the split on the line between this and the corner it is - // not connected to. Also assumes order of vertices is counter clockwise. - d->indexes.append(qMakePair(ushort(p3), ushort(t3))); - d->indexes.append(qMakePair(ushort(p4), ushort(t4))); - d->indexes.append(qMakePair(ushort(p1), ushort(t1))); - } - } - } - } else { - setLastError(FileNotFoundError); - } - } else { - setLastError(InvalidSourceError); - } - - emit geometryChanged(); -} - -QString QWavefrontMesh::log() const -{ - Q_D(const QWavefrontMesh); - switch (d->lastError) { - case NoError: return QStringLiteral("No error"); - case InvalidSourceError: return QStringLiteral("Error: Invalid source"); - case UnsupportedFaceShapeError: return QStringLiteral("Error: Unsupported face shape in source"); - case UnsupportedIndexSizeError: return QStringLiteral("Error: Unsupported index size in source"); - case FileNotFoundError: return QStringLiteral("Error: File not found"); - case MissingPositionAttributeError: return QStringLiteral("Error: Missing '%1' attribute").arg(qtPositionAttributeName()); - case MissingTextureCoordinateAttributeError: return QStringLiteral("Error: Missing '%1' attribute").arg(qtTexCoordAttributeName()); - case MissingPositionAndTextureCoordinateAttributesError: return QStringLiteral("Error: Missing '%1' and '%2' attributes").arg(qtPositionAttributeName()).arg(qtTexCoordAttributeName()); - case TooManyAttributesError: return QStringLiteral("Error: Too many attributes"); - case InvalidPlaneDefinitionError: return QStringLiteral("Error: Invalid plane. V and W must be non-null and cannot be parallel"); - default: return QStringLiteral("Unknown error"); - }; -} - -bool QWavefrontMesh::validateAttributes(const QList<QByteArray> &attributes, int *posIndex) -{ - Q_D(QWavefrontMesh); - const int attrCount = attributes.count(); - int positionIndex = attributes.indexOf(qtPositionAttributeName()); - int texCoordIndex = attributes.indexOf(qtTexCoordAttributeName()); - - switch (attrCount) { - case 0: - d->lastError = NoAttributesError; - return false; - case 1: - if (positionIndex < 0) { - d->lastError = MissingPositionAttributeError; - return false; - } - break; - case 2: - if (positionIndex < 0 || texCoordIndex < 0) { - if (positionIndex < 0 && texCoordIndex < 0) - d->lastError = MissingPositionAndTextureCoordinateAttributesError; - else if (positionIndex < 0) - d->lastError = MissingPositionAttributeError; - else if (texCoordIndex < 0) - d->lastError = MissingTextureCoordinateAttributeError; - return false; - } - break; - default: - d->lastError = TooManyAttributesError; - return false; - } - - if (posIndex) - *posIndex = positionIndex; - - return true; - -} - -QSGGeometry *QWavefrontMesh::updateGeometry(QSGGeometry *geometry, int attributeCount, int positionIndex, - const QRectF &sourceRect, const QRectF &destinationRect) -{ - Q_D(QWavefrontMesh); - - if (geometry == nullptr) { - Q_ASSERT(attributeCount == 1 || attributeCount == 2); - geometry = new QSGGeometry(attributeCount == 1 - ? QSGGeometry::defaultAttributes_Point2D() - : QSGGeometry::defaultAttributes_TexturedPoint2D(), - d->indexes.size(), - d->indexes.size(), - QSGGeometry::UnsignedShortType); - geometry->setDrawingMode(QSGGeometry::DrawTriangles); - - } else { - geometry->allocate(d->indexes.size(), d->indexes.size()); - } - - // If there is not at least a full triangle in the data set, skip out - if (d->indexes.size() < 3) { - geometry->allocate(0, 0); - return geometry; - } - - QVector3D planeV = d->planeV; - QVector3D planeW = d->planeW; - - // Automatically detect plane based on first face if none is set - if (planeV.isNull() || planeW.isNull()) { - QVector3D p = d->vertexes.at(d->indexes.at(0).first); - planeV = (d->vertexes.at(d->indexes.at(1).first) - p); - planeW = (p - d->vertexes.at(d->indexes.at(2).first)).normalized(); - } - - planeV.normalize(); - planeW.normalize(); - - QVector3D planeNormal = QVector3D::crossProduct(planeV, planeW).normalized(); - if (planeNormal.isNull()) { // V and W are either parallel or null - setLastError(InvalidPlaneDefinitionError); - geometry->allocate(0, 0); - return geometry; - } - - QVector3D planeAxes1 = planeV; - QVector3D planeAxes2 = QVector3D::crossProduct(planeAxes1, planeNormal).normalized(); - - ushort *indexData = static_cast<ushort *>(geometry->indexData()); - QSGGeometry::Point2D *vertexData = static_cast<QSGGeometry::Point2D *>(geometry->vertexData()); - - float minX = 0.0f; - float maxX = 0.0f; - float minY = 0.0f; - float maxY = 0.0f; - for (ushort i = 0; i < ushort(d->indexes.size()); ++i) { - *(indexData + i) = i; - - QVector3D v = d->vertexes.at(d->indexes.at(i).first); - - // Project onto plane - QVector2D w; - v -= QVector3D::dotProduct(planeNormal, v) * planeNormal; - w.setX(QVector3D::dotProduct(v, planeAxes1)); - w.setY(QVector3D::dotProduct(v, planeAxes2)); - - QSGGeometry::Point2D *positionData = vertexData + (i * attributeCount + positionIndex); - positionData->x = w.x(); - positionData->y = w.y(); - - if (i == 0 || minX > w.x()) - minX = w.x(); - if (i == 0 || maxX < w.x()) - maxX = w.x(); - if (i == 0 || minY > w.y()) - minY = w.y(); - if (i == 0 || maxY < w.y()) - maxY = w.y(); - - if (attributeCount > 1 && !d->textureCoordinates.isEmpty()) { - Q_ASSERT(positionIndex == 0 || positionIndex == 1); - - QVector2D uv = d->textureCoordinates.at(d->indexes.at(i).second); - QSGGeometry::Point2D *textureCoordinateData = vertexData + (i * attributeCount + (1 - positionIndex)); - textureCoordinateData->x = uv.x(); - textureCoordinateData->y = uv.y(); - } - } - - float width = maxX - minX; - float height = maxY - minY; - - QVector2D center(minX + width / 2.0f, minY + height / 2.0f); - QVector2D scale(1.0f / width, 1.0f / height); - - for (int i = 0; i < geometry->vertexCount(); ++i) { - float x = ((vertexData + positionIndex)->x - center.x()) * scale.x(); - float y = ((vertexData + positionIndex)->y - center.y()) * scale.y(); - - for (int attributeIndex = 0; attributeIndex < attributeCount; ++attributeIndex) { - if (attributeIndex == positionIndex) { - vertexData->x = float(destinationRect.left()) + x * float(destinationRect.width()) + float(destinationRect.width()) / 2.0f; - vertexData->y = float(destinationRect.top()) + y * float(destinationRect.height()) + float(destinationRect.height()) / 2.0f; - } else { - // If there are no texture coordinates, use the normalized vertex - float tx = d->textureCoordinates.isEmpty() ? x : vertexData->x; - float ty = d->textureCoordinates.isEmpty() ? y : vertexData->y; - - vertexData->x = float(sourceRect.left()) + tx * float(sourceRect.width()); - vertexData->y = float(sourceRect.top()) + ty * float(sourceRect.height()); - } - - ++vertexData; - } - } - - return geometry; -} - -/*! - \qmlproperty vector3d WavefrontMesh::projectionPlaneV - - Since the Wavefront .obj format describes an object in 3D space, the coordinates - have to be projected into 2D before they can be displayed in Qt Quick. - - This will be done in WavefrontMesh by an orthographic projection onto an - appropriate plane. - - The projectionPlaneV is one of two vectors in the plane in 3D space. If - either this, or \l projectionPlaneW is set to (0, 0, 0) (the default), - then the plane will be detected based on the first encountered face in the - data set. - - \note projectionPlaneV and \l projectionPlaneW cannot be parallel vectors. -*/ -void QWavefrontMesh::setProjectionPlaneV(const QVector3D &v) -{ - Q_D(QWavefrontMesh); - if (d->planeV == v) - return; - - d->planeV = v; - emit projectionPlaneVChanged(); -} - -QVector3D QWavefrontMesh::projectionPlaneV() const -{ - Q_D(const QWavefrontMesh); - return d->planeV; -} - -/*! - \qmlproperty vector3d WavefrontMesh::projectionPlaneW - - Since the Wavefront .obj format describes an object in 3D space, the coordinates - have to be projected into 2D before they can be displayed in Qt Quick. - - This will be done in WavefrontMesh by an orthographic projection onto an - appropriate plane. - - The projectionPlaneW is one of two vectors in the plane in 3D space. If - either this, or \l projectionPlaneV is set to (0, 0, 0) (the default), - then the plane will be detected based on the first encountered face in the - data set. - - \note \l projectionPlaneV and projectionPlaneW cannot be parallel vectors. -*/ -void QWavefrontMesh::setProjectionPlaneW(const QVector3D &w) -{ - Q_D(QWavefrontMesh); - if (d->planeW == w) - return; - - d->planeW = w; - emit projectionPlaneWChanged(); -} - -QVector3D QWavefrontMesh::projectionPlaneW() const -{ - Q_D(const QWavefrontMesh); - return d->planeW; -} - - -QT_END_NAMESPACE |